Find Reviews and Compare Prices for:       All ProductsCO2 Products     5.0 (1)   Add a review CO2 Check Valve by Dennerle   A very high-quality German CO2 check valve for freshwater or marine applications. A mid-level & mid-priced, quality check valve between the Metallic and the Plastic units. Takes 4/6 mm (ID/OD) or 1/8" airline tubing. Have a question? Just Ask! Member Reviews Compare Prices Product Spec Send to a friend Searched CO2 Check Valve by Dennerle in 150 stores, 0 results found Sorry - We couldn't find any stores offering this product. Please check again. Image Description   Store   Price You can also search these stores   Find this product on Amazon   Amazon.com   2 Store Reviews   Search on Amazon   Find this product on eBay   eBay   5 Store Reviews   Search on eBay Are we missing a store? Let us know! Something wrong in this page? Let us know! Related products: More Dennerle CO2 Products Other CO2 Products internal use: spec436